Neu5Ac (blue), 2,7-anhydro-Neu5Ac (orange), or XY intermediate (gray). B and C, superposition of the 1H,13C HSQC reference spectra of Neu5Ac (blue) and 2,7-anhydro-Neu5Ac (orange) and 1H,13C HSQC reaction mixture at 30 min (where the XY peak is observed to peak, gray) If you treasured this article and you would like to obtain more info about sialic acid powder factory please visit our own web-page. .